Unsupervised delineation of stratum corneum using reflectance confocal microscopy and spectral clustering Journal Article

Authors: Bozkurt, A.; Kose, K.; Alessi-Fox, C.; Dy, J. G.; Brooks, D. H.; Rajadhyaksha, M.
Article Title: Unsupervised delineation of stratum corneum using reflectance confocal microscopy and spectral clustering
Abstract: Background: Measuring the thickness of the stratum corneum (SC) in vivo is often required in pharmacological, dermatological, and cosmetological studies. Reflectance confocal microscopy (RCM) offers a non-invasive imaging-based approach. However, RCM-based measurements currently rely on purely visual analysis of images, which is time-consuming and suffers from inter-user subjectivity. Methods: We developed an unsupervised segmentation algorithm that can automatically delineate the SC layer in stacks of RCM images of human skin. We represent the unique textural appearance of SC layer using complex wavelet transform and distinguish it from deeper granular layers of skin using spectral clustering. Moreover, through localized processing in a matrix of small areas (called ‘tiles’), we obtain lateral variation of SC thickness over the entire field of view. Results: On a set of 15 RCM stacks of normal human skin, our method estimated SC thickness with a mean error of 5.4 ± 5.1 μm compared to the ‘ground truth’ segmentation obtained from a clinical expert. Conclusion: Our algorithm provides a non-invasive RCM imaging-based solution which is automated, rapid, objective, and repeatable. © 2016 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd
Keywords: reflectance confocal microscopy; confocal microscopy; imaging; reflectance confocal microscopies; reflection; stratum corneum; image segmentation; spectral clustering; thickness; clustering algorithms; wavelet transforms; non-invasive imaging; human; unsupervised segmentation; complex wavelet transforms; thickness measurement; lateral variations; localized processing
Journal Title: Skin Research and Technology
Volume: 23
Issue: 2
ISSN: 0909-752X
Publisher: Wiley Blackwell  
Date Published: 2017-05-01
Start Page: 176
End Page: 185
Language: English
DOI: 10.1111/srt.12316
PROVIDER: scopus
PMCID: PMC5303678
PUBMED: 27516408
Notes: Article -- Export Date: 2 May 2017 -- Source: Scopus
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  1. Kivanc Kose
    32 Kose